Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fee7a2d25c9686c…

MALICIOUS

PDF

72.2 KB Created: 2021-09-25 19:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3202f325bb6ae508ace949199ed3810a SHA-1: 7cd295da650d4a7f2cec21fdf70b8e30a29b74ba SHA-256: 2fee7a2d25c9686c5ec33e03cf65cae35ba988c8959fa485bb9129b9ed80ea50
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with many pointing to disposable hosting, suggesting a link farm used for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jv-cms.crazy-jessie.nl/uploads/files/41717279073.pdf
    • https://kurishupally.org/userfiles/file/65004124540.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/161390673545b2---dezedasimafupux.pdf
    • http://temple.mo/userfiles/file/79895456104.pdf
    • https://posaonakosovu.com/ckfinder/userfiles/files/xugujepemuwilipolad.pdf
    • https://www.oalysa.cz/ckfinder/userfiles/files/73812468103.pdf
    • https://gotoko.com/cmsv2/upload/files/53420778025.pdf
    • http://around-sicily.net/userfiles/file/tabatirirorosujadapanojom.pdf
    • http://uptindia.com/newsimages/file///bumobufupisi.pdf
    • http://ihdbd.org/upload/files/tejewomajaxusuvurumivupi.pdf
    • http://www.casasemio.com.br/ckfinder/userfiles/files/dubepikasolojedus.pdf
    • http://inventory-acepipe.com/images/uploads/files/nunumoja.pdf
    • http://watdoenwevandaag.nl/upload/wovisotuwusezuzijoduguno.pdf
    • http://kasintorn.com/images/upload/files/jazajemimuluto.pdf
    • http://cpghollywood.com/userfiles/files/13675020843.pdf
    • https://airbays.com/userfiles/file/74307241816.pdf
    • https://samsungklimamodelleri.com/upload/ckfinder/files/60496194056.pdf
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/45081565383.pdf
    • http://www.hussco-steel.com/husscofiles/files/41641467746.pdf
    • http://wwsm-hk.com/files/file/wusika.pdf
    • https://leise.ru/admin/ckfinder/userfiles/files/73491638383.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614683ec6f695---67515087086.pdf
    • http://prabashproperties.com/ckfinder/userfiles/files/gizolenedugogowodowozuzo.pdf
    • https://www.jakketoes.be/ckfinder/userfiles/files/96246642520.pdf
    • http://giahung.tincorner.com/uploads/files/22361485114.pdf
    • http://gpe-el.pro/ckfinder/userfiles/files/9371104802.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+history+of+witchcraft+and+demonology+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4a9.bin
a72b67d0cac76327744dc639c10c73fbfc75d7242e42e8c1c6840f0981e25eab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A9 17400 bytes
font_01_sfnt_off0000e0bb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BB 16792 bytes
font_02_sfnt_off0000f8d2.bin
29530fdc928b675fa4c45b979394d2b0cde53b12d778a2e0c0bd9a554f2b1d90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D2 11228 bytes

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